scholarly journals An Experimental Method of Distribution Behavior of Hydrophobically Associated Polymer AP-P4 in Three-Phase Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ruyin Li ◽  
Guorong Tan ◽  
Jian Zhang
Keyword(s):  
Experimental Method ◽  
Polymer Flooding ◽  
Water Soluble ◽  
Analysis Method ◽  
Three Phase ◽  
Oil Water ◽  
Phase Systems ◽  
First Time ◽  
Total Salinity ◽  
Distribution Behavior

A novel experimental method has been established for the first time to evaluate the distribution behavior of water soluble hydrophobically associated polymer AP-P4 in the oil-water-solid three-phase systems, based on the static adsorption principle. Suitable analysis method has been selected to measure the concentration of polymer in every phase. The enrichment of polymer has been observed between the oil-aqueous interlayer. The distribution coefficient of AP-P4 is obtained along with the variation of concentration and total salinity. The experimental method is helpful to reveal the property of polymer solution and has potential usage in predicting the adsorption and retention in polymer flooding and the wastewater dealing of polymer flooding.

POLYMERIZATION OF STYRENE IN LOW INTERFACIAL TENSION MICROEMULSION-OIL-WATER THREE-PHASE SYSTEMS

1986 ◽  
Vol 7 (2) ◽  
pp. 245-258 ◽  
Author(s):  
F. M. Rabagliati ◽  
A. C. Falcón ◽  
D. A. González ◽  
C. Martín ◽  
R. E. Antón ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Three Phase ◽  
Low Interfacial Tension ◽  
Oil Water ◽  
Phase Systems

scholarly journals The Application of the Art Area of Graphics in the Initial Grades of Nine-year Primary Education

2021 ◽  
pp. 317-330
Author(s):  
Maja Žmukić
Keyword(s):  
Theoretical Analysis ◽  
Experimental Method ◽  
Primary Education ◽  
Survey Questionnaire ◽  
Analysis Method ◽  
Historical Method ◽  
Teachers And Students ◽  
First Time ◽  
Descriptive Method ◽  
Current Curriculum

The goal of this research is to examine and determine whether the teaching of art studies is realized according to the current curriculum in the primary school grades III and IV grade. The sample consists of 214 students and 10 teachers. The research methods selected for deriving relevant conclusions are a descriptive method, theoretical analysis method, historical method, and experimental method. Results obtained through a survey questionnaire, related to the surveyed teachers, about whether they represent fields of art equally in their art classes, are that they answered in the representation of 100%, as well as the majority of students (96.26%) who answered affirmatively to the same question. During the experiment, 80% of students encountered graphics for the first time, so in this case, the answers in the first survey for teachers and students did not match the current situation in the school. In answering the question of what most art classes are about, the majority of students (82.71%) answered drawing, while the remaining 18.69% answered that they usually paint. According to the students, the areas of art are not equally represented in teaching, as shown by the results of a survey conducted among teachers. With this paper, it has been determined that graphics, as an art discipline, even though it is planned by the primary education’s curriculum with an exact number of hours, is not fulfilled or equally represented in the art studies.

Low interfacial tensions in three-phase systems obtained with oil-water surfactant mixtures

1980 ◽  
Vol 76 (2) ◽  
pp. 277-281 ◽  
Author(s):  
A. Pouchelon ◽  
J. Meunier ◽  
D. Langevin ◽  
D. Chatenay ◽  
A.M. Cazabat
Keyword(s):  
Surfactant Mixtures ◽  
Interfacial Tensions ◽  
Three Phase ◽  
Oil Water ◽  
Phase Systems

Natrophosphate from the Ilímaussaq alkaline complex, South Greenland

2001 ◽  
pp. 139-141
Author(s):  
Ole V. Petersen ◽  
Alexander P. Khomyakov ◽  
Henning Sørensen
Keyword(s):  
Refractive Index ◽  
Kola Peninsula ◽  
Unit Cell Parameter ◽  
Cell Parameter ◽  
Water Soluble ◽  
Type Locality ◽  
Drill Core ◽  
Alkaline Complex ◽  
First Time ◽  
Alkaline Complexes

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Petersen, O. V., Khomyakov, A. P., & Henning. (2001). Natrophosphate from the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190, 139-141. https://doi.org/10.34194/ggub.v190.5184 _______________ The rare mineral natrophosphate has been identified for the first time in the Ilímaussaq alkaline complex in a drill core from the Kvanefjeld area. It occurs sparsely in zoned veinlets with cores of natrophosphate and borders of fibrous trona. The natrophosphate is more or less smoky, transparent and unaltered. The refractive index n = 1.448 ± 0.005 is low compared to that given for the material from the type locality, Khibina alkaline complex, Kola Peninsula; the unit cell parameter a = 27.76 ± 0.05 Å is in excellent agreement with that given for the material from the type locality. The veins occur in hyper-agpaitic naujakasite lujavrite; villiaumite is an associated mineral. Only a few water-soluble minerals have so far been found in the Ilímaussaq alkaline complex compared to the wealth of such minerals in the Khibina and Lovozero alkaline complexes. This is possibly at least partly due to lack of necessary precautions during sampling.

Healthcare and Terrorism: The Lebanese Experience

2021 ◽  
pp. 1-4
Author(s):  
Nooreddine Iskandar ◽  
Tatiana Rahbany ◽  
Ali Shokor
Keyword(s):  
Public Health ◽  
Qualitative Study ◽  
Thematic Analysis ◽  
Terrorist Attacks ◽  
Analysis Method ◽  
Structured Interviews ◽  
Security Issues ◽  
The Face ◽  
The Common ◽  
First Time

Abstract Background: Due to the common instability caused by political and security issues, Lebanese hospitals have experienced acts of terrorism multiple times. The most recent Beirut Explosion even forced several hospitals to cease operations for the first time in decades—but studies show the preparedness levels for such attacks in similar countries are low. Objective: The aim of this study is to explore the experience of Lebanese hospitals with terrorist attacks. Methods: This qualitative study used semi-structured interviews with various stakeholders to assess their experience with terrorist bombings. Data was analyzed using the thematic analysis method. Results: The researchers found that Lebanese hospitals vary greatly in their structures and procedures. Those differences are a function of 3 contextual factors: location, culture, and accreditation status. Hospitals found near ‘dangerous zones’ were more likely to be aware and to have better response to such events. A severe lack of communication, unity of command, and collaboration between stakeholders has made the process fragmented. Conclusion: The researchers recommend a larger role for the Ministry of Public Health (MOPH) in this process, and the creation of a platform where Lebanese organizations can share their experiences to improve preparedness and resilience of the Lebanese healthcare system in the face of terrorism.

scholarly journals Distribution characteristics of typical geological relics in the Western Sichuan Plateau

2020 ◽  
Vol 12 (1) ◽  
pp. 307-323
Author(s):  
Qizhong Wang ◽  
Zhongquan Li ◽  
Yuan Yin ◽  
Shuang Yang ◽  
Wei Long ◽  
...  
Keyword(s):  
Geological Heritage ◽  
Tibet Plateau ◽  
Analysis Method ◽  
Western Sichuan ◽  
Distribution Rules ◽  
Index Analysis ◽  
External Forces ◽  
Qinghai Tibet Plateau ◽  
First Time ◽  
Tectonic Movements

AbstractThe Western Sichuan Plateau (WSP), located in the eastern margin of the Qinghai–Tibet Plateau, is the most strongly deformed region of the continental crust in China. Frequent tectonic movements shape the unique topography and landform of the WSP and have also produced abundant geological heritage resources. Based on the existing geological heritage survey data in Sichuan Province, the nearest index analysis method of employing a regional spatial point model was used to reveal the distribution rules and the genetic mechanism of typical geological relics in the WSP for the first time. Results indicate that the formation and distribution of geological relics in the WSP are generally controlled by tectonic movement and supplemented by the comprehensive action of external forces such as flowing water. Their distribution shows a condensed spatial distribution pattern and extends along the strike of a fault zone and river strike strip. Finally, based on the characteristics of geological relics in the WSP, some suggestions on the protection and development of regional geological relics were put forward.

scholarly journals Geometric Algebra Framework Applied to Symmetrical Balanced Three-Phase Systems for Sinusoidal and Non-Sinusoidal Voltage Supply

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1259
Author(s):  
Francisco G. Montoya ◽  
Raúl Baños ◽  
Alfredo Alcayde ◽  
Francisco Manuel Arrabal-Campos ◽  
Javier Roldán Roldán Pérez
Keyword(s):  
Geometric Algebra ◽  
Dimensional Euclidean Space ◽  
Active Components ◽  
Electrical Circuits ◽  
Current Harmonics ◽  
Operation Conditions ◽  
Multiple Phase ◽  
Three Phase ◽  
Phase Systems ◽  
Definition Of

This paper presents a new framework based on geometric algebra (GA) to solve and analyse three-phase balanced electrical circuits under sinusoidal and non-sinusoidal conditions. The proposed approach is an exploratory application of the geometric algebra power theory (GAPoT) to multiple-phase systems. A definition of geometric apparent power for three-phase systems, that complies with the energy conservation principle, is also introduced. Power calculations are performed in a multi-dimensional Euclidean space where cross effects between voltage and current harmonics are taken into consideration. By using the proposed framework, the current can be easily geometrically decomposed into active- and non-active components for current compensation purposes. The paper includes detailed examples in which electrical circuits are solved and the results are analysed. This work is a first step towards a more advanced polyphase proposal that can be applied to systems under real operation conditions, where unbalance and asymmetry is considered.

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